Like the flip of a switch, Southern California’s warm and dry holiday weather is about to change as a potent storm system moves in.

Rain is expected to arrive in San Luis Obispo and Santa Barbara counties late Monday night into Tuesday, according to the National Weather Service.

By Tuesday afternoon, rain will extend to Ventura and Los Angeles counties.

Interactive California Weather Coverage

Rainfall amounts of 1.5 to three inches are expected along California’s Central Coast. Ventura and Los Angeles counties can expect a half-inch to one inch of rain with higher amounts in the foothills and mountains.

Storm Radar Dec. 26
Storm Satellite-Radar Composite. Dec. 26, 2022

“The storm door will remain open through the rest of the week with a chance of rain every day,” NWS said. “Showers may continue at times through Friday, with another significant storm possible this weekend.”

High temperatures in the Los Angeles area will drop from the 70s on Monday, to the 60s on Tuesday and Wednesday, and then upper 50s on Thursday and Friday.

Drought-stricken California’s mountain snowpack, a key part of the state’s water supply, is off to a good start. But experts remain cautious. Last winter had a similar start and then turned extraordinarily dry January through March, the months that normally bring the most rain and snow.